Improvement in fire-proof floors and roofs



T. HYATT.

Fire-Proof Floors and Roofs.

Patented Dec INVENTDE.

W i'r EssEs- UNITED STATES PATENT OFFICE.

THEODORE HYATT, OF NEW YORK, N. Y.

IMPROVEMENT IN FIRE-PROOF FLOORS AND ROOFS.

" Specification forming part of Letters Patent No. 145,181, dated December 2, 1873; application filed October 8, 1873.

To all whom it may concern:

Be it known that I, THEODORE Hrnrr, of New York city, in the county of New York and in the State of New York, have invented certain new and useful Improvements in Fire- Proof Floors and Roofs; and do hereby de-' clare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, making a part stantially as and for the purpose hereinafter In the annexed drawing, A represents a sheet-metal diaphragm, corrugated transversely, so as to form a series of longitudinal ribs, a, which ribs have each the general form of an arch of a bridge, with downward and inwardinclining abutments, the latter being connected together by means of a horizontal strip, a, that extends between their lower ends. Upon each side of the corrugated diaphragm, and within its grooves, is placed a plastic composition, B, composed of asbestus, combined with gypsum and Portland cement, or other equivalent earthy materials, the proportion used being, preferably, three parts of asbestus, two parts of gypsum, and one part of Portland cement, said ingredients being mixed with water to a proper consistency to permit of their being applied like mortar.

The sections or tiles thus constructed are placed between and are supported by suitable rafters or girders, which latter are provided within their contiguous faces with rabbets, that correspond to and receive the edges of said tiles. the tiles and the beams or rafters are easily made tight by cement, and when used for a roof the entire surface may be coated with the same.

When used for forming mansa-rd roofs, the exterior surface, while in a plastic state, may be molded into any desired ornamental shape or form.

The roof or floor thus constructed possesses great strength from the peculiar form of the corrugated diaphragm, it is entirely fire-proof, has but a fraction of the weight of a floor or roof composed of brick and iron, and can be furnished at a cost materially less than is practioable with other constructions of a fire-proof character.

Having thus fully set forth the nature and merits of my invention, what I claim as new A floor or roof composed of a corrugated sheet-metal diaphragm, covered with asbestus, combined with earthy material, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 7th day of October, 1873.

I THEODORE HYAT'I.

Witnesses:

A. P. BROWN, E. I. STARR.

The joints between the edges of 

